Scrap Synergy Spurs Sustainable Steel StrategyEvery year, millions of scrap tires in Alabama become environmental hazards, littering rivers, roadsides & illegal dumps. To address this, SSAB Alabama Inc. partnered with the Alabama Department of Environmental Management to explore whether crumb rubber from these discarded tires could reduce reliance on traditional petroleum coke in steelmaking.

Tire Trials Test Transformative Technological TacticsSSAB launched a comprehensive trial, injecting crumb rubber into its twin-shell alternating current electric arc furnace in Axis, Alabama. With support from a $361,000 grant, the project tested crumb rubber at substitution rates ranging from 5 to 30 %, across 51 trial heats, carefully observing operational performance & emissions.

Metallurgical Measures Maintain Material MeritDuring trials, metallurgical engineers monitored slag composition, steel chemistry & furnace performance. The findings revealed no detrimental changes. Steel quality remained high, slag conditions were favorable, & customer requirements were fully met. The crumb rubber even supported consistent slag viscosity, aiding overall yield.

Emission Evaluations Endorse Eco-Friendly EndeavourA third-party firm, Gas Cleaning Technologies, assessed gas emissions, measuring levels of oxygen, carbon monoxide, carbon dioxide, sulfur dioxide & nitrogen oxide. Results showed no significant differences between traditional coke heats & those using crumb rubber, affirming its environmental acceptability.

Resource Reuse Reduces Reliance on Refined ResiduesCurrently, SSAB uses about 7,000 metric tons of injected petroleum coke annually. Substituting crumb rubber could consume between 350 to 2,100 metric tons of scrap tires per year, significantly easing landfill pressures while shrinking demand for oil-derived coke.

Public Policy Promotes Practical Pollution PreventionFunded by a $1 fee per new tire under the Alabama Scrap Tire Environmental Quality Act, ADEM’s support for projects like this reflects a broader mission to turn environmental burdens into economic opportunities, while ensuring proper scrap tire disposal.

Cautious Confidence Cultivates Continued Carbon ConversionEncouraged by trial success, SSAB aims to expand crumb rubber use, potentially offsetting both injected & charge carbon. This shift could reshape how scrap tires are valued, transforming them from waste to an asset in sustainable steelmaking.

Economic & Environmental Equilibrium Enhances Enterprise EthicsStephen Cobb of ADEM highlights that giving discarded tires economic value motivates proper disposal. SSAB’s project illustrates how industry can align profitability, environmental responsibility & innovative reuse, offering a replicable model for steelmakers worldwide.

Key Takeaways:

• SSAB successfully trialed crumb rubber to replace 5–30 % of petroleum coke

• No negative impact observed on steel quality or environmental emissions

• Project could reuse up to 2,100 metric tons of scrap tires yearly in steelmaking